Why wasn't this Zenith roundie repairable?

[compucat]

From our perspective today as collectors and restorers, it is sad that what to us would be a simple and routine repair was not worth the bother to a tech or a customer back then. I do remember as a kid in the Seventies that after about five years most TVs needed frequent repairs and the prevailing wisdom was don't keep putting more money into it. The result was that a set that probably would have been good as new with an overhaul on par with what we do now rather than the patch-it-up for another six months type of repair designed to be profitable. Many of these old sets would have had longer service lives, stayed away from the landfills and more would be around today if they had a mini restoration every five to seven years or so. The disposable mentality was starting to take hold especially during the Eighties so repair was less of an attractive option or a first thought back then.